This report provides a comprehensive analysis of Sainsbury's business environment, focusing on the impact of Brexit. It begins by explaining different types of organizations and their purposes, particularly those relevant to Sainsbury's supply chain. The report then explores the size and scope of these organizations. It delves into Sainsbury's organizational structure, differentiating between functional and divisional structures and highlighting the inter-relationships among various business functions. The study further examines the impacts of the macro-environment, particularly Brexit, on Sainsbury's business operations, using the PESTEL framework to analyze political, economic, social, technological, environmental, and legal factors. Finally, the report conducts an internal and external analysis of Sainsbury using SWOT analysis, discussing the strengths, weaknesses, opportunities, and threats and their inter-relationship with micro and macro factors in business decisions. The conclusion summarizes the key findings, emphasizing the challenges and opportunities Sainsbury faces in the current business environment.